1 /* $NetBSD: if_slvar.h,v 1.35 2021/12/12 13:05:14 andvar Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)if_slvar.h 8.4 (Berkeley) 1/9/95 32 */ 33 34 #ifndef _NET_IF_SLVAR_H_ 35 #define _NET_IF_SLVAR_H_ 36 37 /* 38 * Definitions for SLIP interface data structures 39 * 40 * (This exists so programs like slstats can get at the definition 41 * of sl_softc.) 42 */ 43 struct sl_softc { 44 struct ifnet sc_if; /* network-visible interface */ 45 int sc_unit; /* XXX unit number */ 46 struct ifqueue sc_fastq; /* interactive output queue */ 47 struct ifqueue sc_inq; /* input queue */ 48 struct tty *sc_ttyp; /* pointer to tty structure */ 49 u_char *sc_mp; /* pointer to next available buf char */ 50 u_char *sc_ep; /* pointer to last available buf char */ 51 u_char *sc_pktstart; /* pointer to beginning of packet */ 52 struct mbuf *sc_mbuf; /* input buffer */ 53 u_int sc_flags; /* see below */ 54 u_int sc_escape; /* =1 if last char input was FRAME_ESCAPE */ 55 long sc_lasttime; /* last time a char arrived */ 56 long sc_abortcount; /* number of abort escape chars */ 57 long sc_starttime; /* time of first abort in window */ 58 long sc_oqlen; /* previous output queue size */ 59 long sc_otimeout; /* number of times output's stalled */ 60 void *sc_si; /* softintr handle */ 61 #ifdef __NetBSD__ 62 int sc_oldbufsize; /* previous output buffer size */ 63 int sc_oldbufquot; /* previous output buffer quoting */ 64 #endif 65 #ifdef INET /* XXX */ 66 struct slcompress sc_comp; /* tcp compression data */ 67 #endif 68 struct bintime sc_lastpacket; /* for watchdog */ 69 LIST_ENTRY(sl_softc) sc_iflist; 70 }; 71 72 /* internal flags */ 73 #define SC_ERROR 0x0001 /* had an input error */ 74 75 /* visible flags */ 76 #define SC_COMPRESS IFF_LINK0 /* compress TCP traffic */ 77 #define SC_NOICMP IFF_LINK1 /* suppress ICMP traffic */ 78 #define SC_AUTOCOMP IFF_LINK2 /* auto-enable TCP compression */ 79 80 #endif /* _NET_IF_SLVAR_H_ */ 81